I need to determine whether y varies directly with x and if so, I need to find the constant of variation

Question

Y=12x /I need to determine whether y varies directly with x and if so, I need to find the constant of variation

Answer 1

If y varies directly with x then as x gets larger so does y

or as x gets smaller so does y.  It is an equation of the

form "y = kx"

The constant of proportion k is the factor by which this occurs.

 

In the case of y = 12x

y varies directly with x and the constant of proportion is k = 12